What does EnumSet really mean?

Question

I have the following example:

import java.util.EnumSet;
import java.util.Iterator;

public class SizeSet {

    public static void main(String[] args) {
             


        

Answer 1

It quickly turn any Enum elements into a set, EnumSet is yet another type of Set.

public enum Style { BOLD, ITALIC, UNDERLINE, STRIKETHROUGH }

EnumSet.of(Style.BOLD, Style.ITALIC);